Use rfc role in documentation and ignore checking datatracker.ietf.org links

modules/inbound_email/doc/linkcheck_ignore.json

@@ -0,0 +1 @@
+["https://datatracker.ietf.org/*"]

modules/inbound_email/doc/reference.rst

@@ -14,8 +14,7 @@ The *Inbound Email Module* defines a route for each `Inbox <model-inbound.email.
      data of the request.
 
      The request parameter ``type`` define which data type to apply by default
-     it is ``raw`` which expect the bytes of a `RFC 822
-     <https://datatracker.ietf.org/doc/html/rfc822.html>`_ message.
+     it is ``raw`` which expect the bytes of a :rfc:`822` message.
 
      Other available types:
 

modules/ldap_authentication/doc/linkcheck_ignore.json

@@ -0,0 +1 @@
+["https://datatracker.ietf.org/*"]

modules/web_shop_product_data_feed/doc/linkcheck_ignore.json

@@ -1 +1 @@
-["https://www.facebook.com/business/*"]
+["https://www.facebook.com/business/*", "https://datatracker.ietf.org/*"]

trytond/doc/conf.py

@@ -81,4 +81,14 @@ intersphinx_mapping = {
     }
 linkcheck_ignore = [r'/.*', r'https://demo.tryton.org/*']
 
+try:
+    with open(os.path.join(
+                os.path.dirname(__file__),
+                'linkcheck_ignore.json'), 'r') as f:
+        import json
+        linkcheck_ignore.extend(json.load(f))
+        del json
+except FileNotFoundError:
+    pass
+
 del get_info, info, base_url, modules_url, tryton_url, proteus_url

trytond/doc/linkcheck_ignore.json

@@ -0,0 +1 @@
+["https://datatracker.ietf.org/*"]

trytond/doc/ref/tools/email.rst

@@ -14,7 +14,8 @@ Email
 
 .. function:: format_address(email[, name])
 
-   Return a string suitable for an RFC 2822 From, To or Cc header.
+   Return a string suitable for an :rfc:`2822` ``From``, ``To`` or ``Cc``
+   header.
 
 .. function:: validate_email(email)